Tool-trimming machine



April 7, 1925.

1,532,959 J. W. TAYLOR TOOL TRIMMING MACHINE Filed March 17, 1923 2 Sheets-Sheet l Anon/'vas April 7, 1925,

J. w.y TAYLOR TOOL TRIMMING MACHINE Filed March 17, 1923` 2 Sheets-Sheet 2 Arron/vire Patented Apr. 7, 1925.

UNITEDSTATESl JOHN WASHINGTON TAYLOR, OF GADSDEN, ALABAMA.

TOOL-TRIMMING MACHINE.'

Application filed March 17, 1923. `Serial vNo. `625,903.

' speciication.

This invention relates to tool trimming machines and is especially adapted tor use in the ymanufacture of yor subsequent truing of toric tools on `which toric spectacle lenses are ground. f

Briefly stated an important object of this invention is to provide a machine for maling or truing toric tools which is simple to operate, dura-ble in use and cheap to manufacture,

A further object is to provide a -tool trim ming or making machine which is extremely accurate, capable of a wide variety ofV adjustments and which may be advantageously employed to form or true a tool `so that the same will in turn produce a lens having a radius of curvaturel in one meridiandif tering from the radius of curvature in the meridian at right angles thereto.

f Other objects and advantages of the invention will befapparent during the coursev of the following description.

In the accompanying rdrawings forming a part of this application and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a perspective ot the in'lproved tool manufacturing or truing machine.

Figure 2 is a detail sectional vie'w'th'rough the improved machine. N

Figure 3 is a side elevation ot the ma# chine.

Figure 1 is a longitudinal sectional view through the machine.

In the drawingwherein for the purpose of illustration is shown a preferred em-y bodiment of the invention the numeral 5 designates a bed having supporting legs 6 and 7 at the ends thereof and as illustrated in Figure 1 the leg 7 is 'formed with a vertical extension. 8 tc `which a pair of arms 9 arek connected; It might me said that the arms 9 are formed integral with the extension 1() and extend in parallel relation laterally 'from the extension. 1

As illustrated in Figure 1 the branches 12 of a U-shaped yoke 13 are pivoted asin-y dicated at 14 to the terminals of the'hori-- Zontal4 arms Qanda lever orvbeam j16 is rigidly secured to the bight portion of the U-shapedyoke by the set.' screw- 17 `or otherl suitable fastening device.

The lever or beam 16 carriesa tool holder 20 and the toolv holder may be secured in PATENT OFFICE.

an adjusted position on the lever by a setl screw 21 or otherwise. It'will be observed that the lower terminal portion of the holder| l 20 carries a cutter 24 which is moved in' an arcuate path by the verticalmovement of the.

lever 16.

`The' cutter 21'engages the surface of torio tool 26 employed in vgrinding toric lenses and -the torio tool fwhich in this case will be. designated work is secured to a chuck 28 by fa fastening device 3()v of any suitable type and the chuck 28 is-mounted on a lever 32 extending rlongitudinally,

ot the bed and pivotally secured thereto as indicatedv ati 33. the lever 32 moves about a vertical axis while the beam 16 moves about a horizon`l tal axis orabout an axis at right angles to the axis yor' the pin 33. It mightbe stated that the vertical movementfof the cutter 24 gives the desired radius of curvature in. the perpendicular meridian. This curve is known as the base curve and may be set. at any `traction of' a diopter from 1.00 diopter to 10.00diopters.

It/will be. seen` thaty As the main lever 16 is operatedv in a vertical plane, it imparts a longitudinal n'ioveme'nt to a link 5() connected to a pin 61 ot the attaching member or yoke l2 through the' medium of., al swivelv member 52- vFigure 1 illustrates that the lswivel member 52 is adjus'tably'r securedtoethe'link 50 by-a set screw 53. y VOne end` of they link 50 is provided withv an attaching member or bar 5`5jand with a pawl y5'? ywhich enf;

gagesv a ratchetv wheel 58 mounted -on` a 7 feed screw 59, f More specifically the ratchet wheel 58 is rigidly secured to the v'feed ,l

screw` so that when the pawl'57 is operated by the movement of, the y'link' 50 the Yfeed screw will be rotated in4 one direction. course the pawl 57 is reversable and may be swung into'engagement with either side ot vthe' ratchet wheel whereby the feedl screw is operated in the'proper direction.

lVhen the rtecd screw is. operated it 11nparts movement to a feed nut 60 mounted ythereon and having connection With the l lever 32,

which lever feeds the. Work-to, the cutter. A

i The chuck 28 may be adjusted longitu.-

`dinally of vthe, lever 3.2,by meansv of feed. f

screw 150 threaded through the chuck, and

having' its rearportion` formed with 'a hand- Wheel 151. f l

The rear portion of the feed screw ris connected to the lever 32 by means of va f latterallyprojecting" bracket 1454,A the said bracket vvbeing connected to z'icollaif'152 ad- 28 Will be caused ,-tomove longitudinally position'ontlie `shaft and smaller adjust-y 16 Will-cut the greater vfor Ebase curve.

onjthe base and thelever 82. chuck has been adjusted on the lever la set screw 160 ist'ightened for securing the chuck Ato the lever:

However, the foregoing methodof adjust-ing is only used vfor minor adjustments and inthe case 'ofmajor adjustments the vset screvvs 153 and 160 are loosened so thatv the chuck may `loe-"moved to any desired ments may sub'se'quenlty Vbe made;

In use'4 the toric tool toV be trued orthe casting for anew tool is Vmade secure in the chuckr 28 and the cutter 24`is set at anydesired "distance from the center of motion oflev'er 16 -at the pivot point 14 by moving the tool,holder` longitudinally on the lever 16.

The vertical movement of the main lever In settingrthe lmachine the center'- of motion ofthe lever 32"*at the pivot point 33 is set tothe right `of the center of'inotion of the lever 16 the proper distance bv gradua-L tions onl the bed to produce a shorter radius from rthe lpivot point 33, to the Work 26.A Thedifte'renceofthe radii ofthe cutterfand the Work 26 determines thedioptric po'iverfor cylindrical power of the toric surface. After the machine is set the Work is done 'by raising and lowering vthe lever 16 by. hand and rthis carries 'the-cutteron its f set radius-tand fthe lever 32- is moved i'nsarhorizontal' direction as previously statedfxl The-Work is brought against the cutter :by moving the chuck lor .Work holder v28 lon the horizontal lever-82 and-it Will be readily.seen'thativhen it is desired to 'produce a concavedf torio surface thecutter 24^`is arranged at one-v side of the Work and when it is vdesired to produce ay convex toric surface the cutter'is locatedv at the opposite side ofthe Work. f

With;V reference. to the foregoing descrip.-

.tion taken in connection with. theaccomf vpanving dra-Wing it-Will be seen'that a machine constructed :inlv accordance withv this invention is economical to opeiate and is It Will be seen thatv After the capable of a Wide variety of adjustments,

by means of Which a toricv surface of the. desired curvature may. be produced,

Having thus described the-invention, what prising a bed, a vertically movable lever having an attaching member horizontally pivoted to said bed, a tool holdermounted on said lever yand adapted for vertical movev ment in' an arcuate path7 a cutter carried by said holder, a Work supporting chuck mount-A ed on 'saidbech a horizontal leverfor movf ing' said chuek horizontal in an arcuate "pa-th,

andmeans voperated bythe attaching 'inem-KVV ber of said lirstf named lever for moving the horizontal lever transversely ofthe bed.`

2. A machine ofthe characterspecified comprising a bed, a. yoke pivoted theretoand adapted for movement about av horizontal plane,` a main lever secured tothe yoke,v a 'tool' holder adjustable on the lever and having acutting tool,4 a vWork supporti-iig chuck having means for supporting Work-inthe' path ofV travely of-said cutter, an'd'v-Ameans vvhereby to move the chuck about'an aXis atright angles to the pivotjpoint of said yoke-duringfthe movement of said lever.`

3, A machine of thecharacter specified comprising afbed, a yoke pivot'ed toone end o f said bed, a main lever 'connected `tovsaid sa y yoke, a tool holder'mounted on said lever and 'havinga cutter, a 'chuck mounted on said bed land having Vmeans to' support work inthe path of travel of said cutter,I a second lever having connection vvi-thfsaid chuck and being'pivoted-to the bed, the pivot point of said secondnained leverl being at right angles to the axis of the pivot of said yoke, Y

and-means operated byfsaid yokefor moving said second named; lever', transversely of the' bed during the` movement of said l'tirst named lever. f Y

f4. A machine for producing toric surfaces comprising a bed.,v a lever having a yoke pivoted to the bed, a tool holder mounted on the lever and provided With a cutteig-'a Work holding chuckinounted on the bed vand having means l,for supporting the Work in the path of travelfoffsaidcutter,v a lever pivoted to said bed and having connection with said chuck, a feedsci'ew having affeed nut connected to said secondwnamed'lever, a ratchet wheel connected to said lfeed'lscreiv7 a pawl lassociated ywith said vratchet Wheel, a. link` connected ktofsaid fyoke and Ato said pavvl Wherebythe `movement ofsaid pavvl operates. said yoke and turnsv said feed screw7 for moving the lever pivoted tothe bed A"transversely of the bed* Y 5. A. machine lfor producing vtoric surfaces comprising a. lever havingal laterally proj ecting'attaching` yoke, means lpiviotallv supporting the yoke, a tool holder..adjustabie on saild'lever andhaving azcutter, said lever being adapted for operating said cutter to produce the maj or curve in the work, a work holding chuck having means to support the work in the path of travel of said cutter, and means whereby to move the work about an axis transversely to the axis about which said first named lever operates whereby. to produce the minor curves in the Work.

6. A machine of the character specifiedV comprising a movable holder adapted for supporting a cutter, a lever pivotally supported adjacent one end Vthereof and movable at right angles to the path of tra-vel oit' the holder, a chuck having connection with and to move in a horizontal arcuate path by said lever and having work supporting means, and means operated by the vmovement of said holder and connected to said lever outwardly of said chuck to move said `7. A machine of the character described y comprising a lever7 means at one end of the lever for pivotally supporting the same for movement about a substantially vertical axis, a chuckconnected with the lever intermediate the ends thereof and adapted for supporting work, a tool holding member movably arranged adjacent said chuck, and means operated by said tool holding member and connected to said lever outwardly of said chuck and at a point spaced from the same to move thel lever and the chuck back and forth in a substantially horizontal path. l

JOHN VASHINGTON TAYLOR.v 

